Integrative Cognitive Behavior Therapy in the Treatment of Paranoid Schizophrenia with Obsessional Ruminations: A Single-Case Clinical Study

Introduction: Those who experience both psychotic symptoms and obsessive-compulsive disorder encounter difficulties that extend well beyond the scope of standard treatment approaches. These individuals might encounter a perplexing blend of distressing thoughts, intense emotions, and actions that do not neatly align with conventional classifications. Consequently, they require therapeutic methods that are specifically designed to tackle not just paranoid anxieties and constant overthinking, but also the foundational patterns of unproductive thought that fuel these challenges. Objectives: This case study examines A.S., a 35-year-old research scholar diagnosed with Paranoid Schizophrenia (F20.0, incomplete remission) and Obsessive-Compulsive Disorder (F42.0, characterised by primarily obsessional thoughts and ruminations). The goal is to detail his clinical presentation, clarify the integrated cognitive-behavioral and metacognitive strategies employed to comprehend his challenges, and summarise the hospital-based CBT intervention tailored for him. Method: A comprehensive evaluation procedure was conducted, which involved a clinical interview, an in-depth mental status examination, and the use of standardised tools like the Y-BOCS and BPRS. The treatment plan was developed using established psychological models—Freeman’s approach for persecutory delusions and Salkovskis’ framework for OCD—while also integrating a metacognitive perspective that highlights how individuals can get stuck in cycles of repetitive, negative thinking. A.S. underwent this therapy in a hospital setting while on consistent medication. The intervention involved providing psychoeducation to assist him in understanding his experiences, normalising intrusive thoughts, challenging and reframing unhelpful beliefs, practicing detached mindfulness, and gradually engaging in behavioural experiments to lessen rumination, safety behaviours, and social avoidance. Findings: Throughout therapy, A.S. gained greater insight into his thought processes and developed the ability to manage distressing intrusive thoughts with reduced fear and self-judgment. He expressed a sense of reduced threat from paranoid thoughts and an increased ability to manage his emotions, which subsequently improved his connections with others. Post intervention, there was a notable reduction in his obsessive-compulsive symptoms and suspiciousness, shown by a decrease in his Y-BOCS score from 25 to 11, along with BPRS scores reflecting much milder symptoms. The paper emphasises the effectiveness of insight-oriented integrated cognitive behavioural therapy as a valuable addition to medication for patients dealing with complex comorbidities in standard hospital environments. Conclusion: A customized, integrative CBT strategy based on cognitive and metacognitive models can effectively reduce obsessional ruminations and persecutory ideation while improving functioning in a patient with paranoid schizophrenia and comorbid OCD.